2 definitions
by
dmoney52806

That option in every setting menu of every monitor in the world, the icon is a U with a slash through it. Little kids like to always press it because it makes the screen shake, and old people don't know about the button. Everyone else thinks that it either hurts your computer or cleans it.

kid:JOHNY LOOK AT THIS BUTTON I FOUND
johny:WHAT IS IT?!!?
kid:de..gau..ss..!!!
johny:degauss? cool what's it do?!
kid:not sure but it's real neato see watch!!
johny:cool!! let me see if i have it on mine!
teacher:kids stop doing that! it's bad for your computer!

The first Monday after the 4th of July weekend. Called this because by this time people have to start going back to work so there's no more fireworks being lit off, so the smoke clears and everything is seemingly "blacker."

guy waking up:AHMAHGAD what happened to the side of the house!
wife:oh honey it's just black monday
guy waking up:oh ok, where's breakfast?